 The common cuttlefish is one of the largest species of cuttlefish with their mantles (does not include their head and arms) reaching upwards of 45 cm.The mantle houses the reproductive and digestive tracts of the cuttlefish and is also home to an internal shell called the cuttlebone.The common cuttlefish has two highly developed eyes, eight arms which are located around the mouth and are used to hold and move prey, two tentacles which are used to quickly capture prey, and a radula which is used to tear and rip apart any prey they have captured.